!PLEASE ANSWER ASAP!

seats in a theater are curved from the front row to the back. the front row has 10 chairs, the second has 16 and the third has 22, and so on.

1. write a recursive rule for this series:

2. write an explicit rule for this series:
* if you simplify, please show all of the steps

3. using the explicit formula, find the number of chairs in row 5 (show your work):

4. the auditorium can hold 17 rows of chairs. write a sigma notation for this series, and then use either series formula to calculate how many chairs can fit in the auditorium.